Clamp for paper-cutters.



c. SEY-BOLD.

CLAMP FOR PAPER CUTTERS-' APPLICATION FILED MAYIZ. I9l6. l

Patented Apr. 2, 1918.

CHARLES SEYBOLD, OF DAYTON, OHIO.

CLAMP Foe PAPER-CUTTERS.

menses;

To all whom z'tmay concern."

Be it known that 1, CHARLES SEYBoLma citizen of the United States,.and aresident.

of the cityof Dayton, in the county of-Montgomery and State of Ohio,have invented certain new and useful Improvements 1n Clamps'forPaper-Cutters, of which the following is a full, clear, and exactdescript on, reference being had to the accompanying drawing, formingpart of this specification.

My invention relates to clamps for paper cutters particularly for use incutters for clamping paper which by the process of manufacture has beenmade of uneven thickness; such, for example, as plate-calendered paperin which the paper is thinner in the central portions than on the edges.In cutting such paper, as the power clamp com. presses the paper priorto the cutting operation, the paper pile is very apt to shp under theunyielding strain. Accordingly it is my object to provide a deviceauxiliary to the main clamp of a paper cutter or the like,

which will prevent the slipping of bundles of paper beneath the mainclamp.

In this connection, it is my ob ect to provide that the auxiliary clampcomes into contact with the pile of paperin advanceof the main clamp,with a yielding mounting for the auxiliary clamp to permit it to yieldas the main clamp. comes into play. I also provide in connection withthe yielding feature for the auxiliary clamp a means for keeping theclamp in parallelism with the main clamp at all times, so that it cannottip at one end by reason of its yielding mounting should the paper pilebe more unyielding at one portion than another.

It should not be understood that plate calendered paper is the only kindthat is to be used with my new device, as it is intended to be used inconnection with paper cutters V and the like, whenever it is convenientor desirable.

The objects above noted are accomplished by that certain constructionand arrange ment of parts to be hereinafter more specifically pointedout and claimed.

In the drawing, 7 V

Figure l is a front elevation of the clamp, partly broken away.

Fig. 2 is a rear elevation showing a part of the auxiliary clamp and therear of the clamp proper. p 7

Fig. 3 is a vertical section, taken through i Specification of LettersPatent.

Patented Apr. 2, 1918.

Application filed May 12, 1916. Serial No. 97,198.

the toothed portion of the shaft for maintaming parallelism in theauxiliary clamp. Fig. 4 is a detail vertical section taken through thejournal box for the shaft.

Fig. 5 is a rear elevational detail showing the method of attaching oneof the racks to the auxiliary clamp bar.

It has not been considered necessary to show any parts or" apaper-cutting machine, asthe clamp device shown could be applied to anyform of machine that should be de sired. The clamp 1;-has a tenon 2 atthe lower end, over which is fitted a shoe 3. This shoe is not arequisite of this invention and could be omitted altogether withoutaiiecting the operation of the clamping device.

Mounted by means of slots 4 on heavy screws 5 set into the rear of theclamp 1, is the auxiliary clamp bar. 6. The bar is of such length thatit will extend beyond the shoe on the base of the main clamp whenpressed down on the screws as far as it will go. Mounted in housings 7,7 set between the webs at the rear of the main clamp are springs 8, 8,of considerable power, which said springs are seated at the base insockets 9, 9, in the upper end of the clamp member 6.

Thus when the entire clamp is brought down upon a pile of paper, thefirst member to contact with the pile will be the auxiliary clamp. Thiswill firmly engage the bundle and hold it against slipping until themain clamp has fully compressed the pile, the

springs permitting the auxiliary clamp to raise, while still maintainingpressure as the main clamp comes down.

It canbe seen that with some piles of paper of different degrees ofcompressibility, the auxiliary clamp might be held up at one end and tipdown at the other, thereby giving an uneven pressure to the entire pile,and thereby tending to shift the bundle before the main clamp comes intoplay instead of merely holding it firm until full pressure is applied.To prevent this, means are provided to cause the auxiliary bar to remainalways in parallelism with the main clamp.

For this purpose, journal boxes 10, 10, are fitted into the spacebetween the horizontal webs of the main clamp bar, near the ends of thebar, and held against slipping laterally by means of set screws 11, 11,that engage in recesses in the main clamp. The auxiliary clamp bearsagainst the rear faces of the boxes and serves to hold them in place. Inthese boxes is journaled a shaft 12, which extends lengthwise of themain clamp in the above mentioned space, and this shaft has on its twoends, or elsewhere along its length if desired, longitudinal toothedportions 13, Or pinions, Seated in recesses let in the inner side of theauxiliary clamp are rack plates 15, held in place by screws 16. Theseracks mesh with the toothed portions of the shaft, and thus when the baris raised at one end, the revolving of the shaft will raise the bar atthe other, maintaining a complete parallelism of the auxiliary clampwith the main clamp.

lVhile I have illustrated the auxiliary clamp as mounted on the mainclamp as a prefe able and convenient construction, it will be understoodthat the essential feature of my invention is a construction in which anauxiliary clamp is employed to operate in advance of the main clamp forthe purposes set forth, and that failure to describe alternativestructures coming within the spirit of the invention, and failure topoint out all the various uses to which the invention may be put shallnot be considered as limitations on the interpretation of the claimsthat follow.

Having thus described my invention, what Copies of this patent may beobtained for I claim as new and desire to secure by'Letters Patent, is

1. In a clamp device for paper cutters and the like, the combinationwith a main clamp, of an auxiliary clamp, means for yieldingly mountingthe same on the main clamp, so as to normally occupy a position beyondthe main clamp to first contact with the paper to be acted upon, andmeans for maintaining the auxiliary clamp in parallelism with the mainclamp, comprising a shaft on the main clamp, with racks and pinionsintermediate the shaft and the auxiliary clamp, substantially asdescribed. a

In a clamp device for paper cutters and the like, the combination with amain clamp, springs in the main clamp, an auxiliary clamp presseddownwardly by the springs, 'mcans: for mounting the latter clampslidably on the main clamp, so as to be spring-pressed to a position tocome into clamping position ahead of the main clamp,

and means for maintaining the auxiliary clamp in parallelism withthemain clamp, comprising a shafton the main clamp and means on saidshaft meshing with said auxiliary clamp at a plurality of positions.

CHARLES SEYBOLD. lVitnesses IL- IAM- F. KINZ R, EMMETT E. LEO.

five cents each, by addressing the Commissioner of Eatenta,

Washington, D. O.

